arm64: dts: qcom: Add MST pixel streams for displayport

arm64: dts: qcom: Add MST pixel streams for displayport

Update Qualcomm DT files in order to declare extra stream pixel clocks
and extra register resources used on these platforms to support
DisplayPort MST.

The driver will continue to work with the old DTS files as even after
adding MST support the driver will have to support old DTS files which
didn't have MST clocks.

Signed-off-by: Jessica Zhang <jessica.zhang@oss.qualcomm.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250916-dp_mst_bindings-v9-2-68c674b39d8e@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>